Fix indentation for text translation authentication entry

Author: laujan

articles/ai-services/translator/toc.yml

@@ -138,9 +138,9 @@ items:
     href: text-translation/preview/translate-api.md
   - name: Transliterate 🆕
     href: text-translation/preview/transliterate-api.md
- - name: Text translation authentication
-  displayName: key,subscription,endpoint,region,location,resource,token,header,header value,header-value
-  href: text-translation/reference/authentication.md   
+  - name: Text translation authentication
+    displayName: key,subscription,endpoint,region,location,resource,token,header,header value,header-value
+    href: text-translation/reference/authentication.md   
 
 - name: Document translation
   items: